Improvement in machinery for boring bobbins



UNITED STATES PATENT OEEICE.

CURTIS E. NORRIS, OF PEAOHAM, VERMONT.

IMPROVEMENT IN MACHINERY FOR BORING BOBBINS.

Specilication forming part of Letters Patent No. 6,374, dated April 24, 1849.

To all whom, it may concern,.-

Be it known that I, CURTIS E. NoRRIs, of Peacham, in the county of Caledonia and State of Vermont, have invented a new and useful Machine for Boring Bobbins, Spools, &c., which is described as follows, reference being had to the annexed drawings of the same, making part of this speci'iication.

Figure 1 is a side elevation of the machine. -Fig. 2 is a birds-eye view of the machine. Fig. 3 is a vertical longitudinal section through the center of the carriage, mandrel, cam-wheel, &c. Fig. 4 is a vertical section showing the apparatus for holding the spool or bobbin.

Similar letters in the several figures refer to corresponding parts.

a is the frame.

h is the boring-tool.

c is the socket into which the boring-tool is inserted.

el is the pulley for'turning the boring-tool. e is a carriage for carrying the spool to be bored. y

ff f2 are slides or ways by which the carriage is guided and supported. One of said ways f is a round rod passed through eyes iixed to the side of the carriage. The other way is formed by two horizontal dat parallel plates ff2, between which tenons on the side of the carriage slide back and forth.

g g are two stirrups that connect the carriage to the Lipper end of a vibrating board 7L, jointed by its lower end to a sill of the frame, its upper end moving to and fro in the arc of a circle by the action of the cam-wheel j for moving the carriage to and fro.

is an anti-friction roller attached to the vibrating board h, against which the camwheel acts during its revolving motion.

s is the spool to be bored. tis a dog for holding it firmly to the carriage.

The cam-wheel j is so formed that the carriage shall recede a uniform distance from the boring-tool and advance toward it at unequal distances gradually increasing as the wheel revolves, the carriage gradually ad. vancing toward and receding from the boringtool at each successive movement of the wheel a segment of a circle, said unequal movement or advance of the carriage being effected by making the depressions between the protuberances which are equidistant on the periphery of the wheel of unequal depths and of a curvature gradually blending with the reverse curvatures of the protuberances, so that the transition of the roller i from a projection to a depression maybe gradual and easy. The cam-wheel j, if made withoutthe protuberances, would be like the common eccentric cam-wheel, and if when' the machine is started the point were in contact with the antifriction roller 7l and turned in the direction of the arrow the advance of the carriage with the spool to the boring-tool would be gradual and without any retrograde movement to clear the tool of chips; but by making the wheel with protuberances over its surface of equal radii the spool is caused to recede from the boring-tool at every few revolutions of the tool, in order to clear itself of chips, while the boring increases in depth caused by the increase in depth of the depressions on the cani-wheel. The rollert'is kept in contact with the surface of the cam-wheel by the gravity of a weight 7c, attached to a c'ord Z, fastened to the carriage. The dog t is held down upon the bobbin or spool by a helical spring m, through which is passed a connect` ing-rod n, that connects the dog tito a lever 19, whose fulcrum is seen at q. The spring fm rests against the top of the lever and the bottom of the carriage, exerting an influence against the lever p and causing the dog t, attached to the lever p, to press upon the spool.

To disengage the dog t from the spool s, theA end of the lever p must be raised, which contracts the spring m and lifts the dog t. When the spool is bored and isrequired to be moved and replaced by another spool not bored, the carriage will be held in a fixed position by a notched bar to, turning on a pin and made to drop and hook over a plate o, fastened to the end of the frame. During the operation of boring this bar is held clear of the plate i: by a notched trigger w, that turns on a pin w,

said trigger being held in contact with the A notched bar by a spring y.

A is a stop inserted horizontally into the frame, against which the trigger w strikes in order to drop the notched bar u over the plate e and hold the carriage from moving. Vhen the cam-wheel j has performeda revolution and the roller t has entered the depression j3, the spool will have advanced toward the boring-tool as` far as it is intended to go, and then the trigger w Will strike the stop A, vibrate the trigger, contract the spring y, and disengage the trigger from the bar, Whose longer arxn, containing the notch being heaviest, drops and brings the notch over the plate t and stops the motion of the carriage. The lever p is then raised, which raises the dog t and contracts the spring m. The bored spool is then removed and an unbored spool put in its place and the dog let down upon it. The long arm of the bar u is then disengaged from the plate o and the end of the short arln brought under a tooth of the trigger w, which holds the bar it disengaged from the plate QJ, as represented in Figs. 1 and In Fig. 4 the bar is shown engaged with plate o. B is the niain or driving shaft located inthe lower part of the frame orin any convenient place, to which the power is applied for operatin g the several parts. C is a pulley on the shaft B, around which is passed a band C', that leads around a pulley d on the shaft E of the boring-tool. D is another pulley on shaft B, around which is passed a band F3, leading around guide-rollers F F to a pulley G on the end of a horizontal transverse shaft II, having on its opposite end a pinion I, that gears with a oog-wheel J on the cam-shaft K.

Operation: By giving motion to the main shaft B by any'convenient power the operative parts of the machine Will be put in Inotion, causing the boring-tool to revolve in its stationary bearings, While the spool is caused to ino've to and from the boring-tool reciprocally for freeing the tool of chips, duc., as before described.

I do not claim any of the parts of this machine except in their application to said ina- Chine; but

XVhat I do claim as new and of my invention, and desire to secure by Letters Patent,

isi The combination and arrangement of the cani-Wheel j, hinged vibratory-board 7L, connecting-arms g g, carriage e, and cord Z, Weight 7e, notched bar it, trigger w, and stop A for imparting to the spool to be bored a horizontal rociprocatory motion to and from the boringinstrurnent and for arresting the motion of the carriage at successive intervals,1 in the manner and for the purpose herein set forth.

In testimony whereof I have hereunto signed my naine, before two subscribing witnesses, this 2d day of June, 1848.

CURTIS E. NORRIS. itnessesz T. SANBORN, WILLIAM MATLocK. 

